Only @ Best BuyEasily link audio devices with digital audio outputs to devices with analog audio inputs using this Insignia NS-HZ313 digital-to-analog converter, which is optical or coaxial input selectable to accommodate a wide range of audio devices.
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Recently bought a fantastic LG 55 in. 4K HD television, not even expecting to open it and find it only has Optical and HDMI out ports for sound. I really did not want to replace a $500 Polk Audio Sound Bar and Sub simply because it only has RCA "in" connections. This adapter works as advertised. No loose connections as reviewed by some others. My adapter worked right out of the box....as long as you don't count the twenty minutes or so I stood there trying to figure out that I needed the switch (on the side) set to "optical" because that's the cable I had. Just really relieved that I only had to spend under $40 and NOT another $400.